Appendix 6.A.1
Here, I will present the results of the different models in more detail.
Table 6.A.1.1 presents the results of the heteroskedastic regression for fundamental amendments. Table 6.A.1.2 gives the results of the combination of fundamental and major amendments. Table 6.A.1.3 presents the results of all amendments.

*** p < 0.001; ** p < 0.01; * p < 0.05.

*** p < 0.001; ** p < 0.01; * p < 0.05.

*** p < 0.001; ** p < 0.01; * p < 0.05.
Figure 6.A.1.1 gives the graphic representation of fundamental amendments. Figure 6.A.1.2 presents the fundamental and major amendments. (The graphic representation of all amendments is presented in the main text as Figure 6.2).
The effect of constitutional rigidity on the rate of fundamental amendments (amendments of constitutions in effect in 2013 in all democratic countries)

The effect of constitutional rigidity on the rate of significant and fundamental amendments (amendments of constitutions in effect in 2013 in all democratic countries)
